Method of providing pneumatic drive for closing a scissors

Details Method of providing pneumatic drive for closing a scissors Method of providing pneumatic drive for closing a scissors

1988-04-18

1989-07-25

Thaler, Michael H.

Surgery

Miscellaneous

Methods

128305, 128318, A61B 1732

Patent

active

048503770

ABSTRACT:
There is disclosed herein a system for providing control of multiple functions needed to perform eye surgery. A microprocessor based system controls a vacuum generation system using venturis and linear valves and a pneumatic system for driving vitrectomy probes and pneumatic scissors in either a variable frequency, multicut mode or a proportional cut mode where the cutting pressure is proportional to the position of a foot operated position sensor.

REFERENCES:
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patent: 3842839 (1974-10-01), Malis
patent: 3899829 (1985-08-01), Storm
patent: 3977425 (1985-08-01), Hayashida
patent: 4245815 (1981-01-01), Willis
patent: 4314560 (1982-02-01), Helfgott et al.
patent: 4757814 (1988-07-01), Wang et al.
Dr. Geoffrey Sutherland; Greishaber & Co. Switzerland, Augeninstrumente Ophthalmic Surgical Instruments. (2 pages of photocopies). Sutherland Rotatable Intraocular Microscissors.
Site TXR Product Catalog, Site TXR System 2000, 2200, 2400; Site TXR Modules 3500, 7500; Site TXR Accessories; Cutting Accessories; Posterior Segmant Acces . . . and System Accessories, Site Microsurgical Systems Inc., 1985 (21 pages of photocopies).
Wang et al.; Proportional Control for Pneumatic Cutting Device: Ser. No. 706,653 (now abandoned in favor of Ser. No. 001, 235). pp. 1-8, and drawing (1 page).
Grieshaber Brochure (Membrane Pealer and Cutter).

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